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Rebecca had 9/10 of a yard of ribbon. Then she gave 7/20 of a yard to a friend. How much does she have left? Explain your work

Respuesta :

musiclover10045

rewrite fraction s to have common denominator:

9/10 = 18/20

 now subtract:

18/20 - 7/20 = 11/20 left

JeanaShupp

Answer: [tex]\dfrac{11}{20}[/tex] yards

Step-by-step explanation:

By considering the given information , we have

The total initial length of ribbon = [tex]\dfrac{9}{10}[/tex] yards

The length of ribbon she gave to her friend = [tex]\dfrac{7}{20}[/tex] yards

The length of ribbon she has left = Initial length - Length she gave

[tex]=\dfrac{9}{10}-\dfrac{7}{20}[/tex]

[tex]=\dfrac{9\times2}{10\times2}-\dfrac{7}{20}[/tex] [Multiply 2 on numerator and denominator to the first fraction to make both fractions like.]

[tex]=\dfrac{18}{20}-\dfrac{7}{20}[/tex]

[tex]=\dfrac{18-7}{20}=\dfrac{11}{20}[/tex]

hence, the length of ribbon she has left = [tex]\dfrac{11}{20}[/tex] yards

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